Author Topic: Keyboard blowing fuses.  (Read 1037 times)

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Offline Topman

Keyboard blowing fuses.
« on: August 16, 2017, 10:54:03 AM »
We were using the keyboard on the weekend and playing outdoors at a fairly high volume.
After playing for approx. 1 hour or so, the keyboard somehow caused the power breaker in the building to trip.
We reset the breaker and continued for another few minutes and the breaker tripped again.  We tried several different power supplies from the building
but each one tripped the power supply.
What part of the keyboard would cause a short to trip the power supply.
      Thanks,   PSR 3000.
 

Offline jtrue

Re: Keyboard blowing fuses.
« Reply #1 on: August 16, 2017, 02:58:26 PM »
Your question is confusing because of the equivocal use of the term "power supply", especially in the sentence, "We tried several different power supplies from the building but each one tripped the power supply."  It would be helpful if you could distinguish among the circuit breaker, the building power outlet(s) and the AC power adapter (sometimes called "the brick") that plugs into the keyboard. Also, the subject line refers to fuses but they are not mentioned in the message body. Were any fuses actually blown?  If so, where were they located?

It would be good to know if you had spare AC power adapters that were swapped out during the job.  If you have only one it is the prime suspect.

  j.
« Last Edit: August 16, 2017, 03:01:15 PM by jtrue »
It don't mean a thing...
 

Offline Topman

Re: Keyboard tripping circuit breakers.
« Reply #2 on: August 17, 2017, 08:14:53 PM »
  Thanks for the reply,

My apologies for not being clear.  We tried power from various and different circuits supplied from the house, not just different outlets.
Each time, after playing for approximately 5 minutes, the keyboard caused the circuit breaker on that particular circuit to trip.  This was repeated when we tried different circuits.
  Like you I suspect the AC power adapter.  And no, we did not and do not yet have another one to try. 
It appears as though the power adapter, once warmed up, must be, as you say, the prime suspect.
   Thanks for your input.
 

Offline jtrue

Re: Keyboard blowing fuses.
« Reply #3 on: August 18, 2017, 04:38:52 AM »
The additional question is whether any other devices, like amplifiers or stage lights, were part of your set-up. If so, adding the keyboard may just have been "the straw that broke the camel's back" to overdraw the circuit breakers but the actual culprit is another part of your rig that malfunctioned after warming up.

No need to apologize.  We're all learning from each other here.

  j.
It don't mean a thing...
 

Offline Topman

Re: Keyboard blowing fuses.
« Reply #4 on: August 18, 2017, 11:40:06 AM »
Actually,  we did manage to find one dedicated circuit which had no other power sharing and the keyboard tripped that breaker as well.
So we will look at your original suggestion regarding the power adapter.
 Is it imperative that we have an original power adapter or just one with the same parameters?
      Thanks
 

Offline jtrue

Re: Keyboard blowing fuses.
« Reply #5 on: August 18, 2017, 12:17:24 PM »
An adapter with the same parameters will probably do fine. That topic has come up a number of times and several members here have reported satisfaction with generic adapters that can be found on Amazon, eBay and other sites.  I personally have used only Yamaha brand, either the exact original model or its later Yamaha replacement, because I'm the type that is not comfortable putting a thousand dollar keyboard at risk to save, say, fifty bucks on a generic adapter. But I have no reason to doubt the experience of others. Perhaps someone else will chime in.

   j.
It don't mean a thing...
 

Offline Topman

Re: Keyboard blowing fuses.
« Reply #6 on: August 19, 2017, 11:28:23 AM »
Okay, thanks for that.
 

Offline jtrue

Re: Keyboard blowing fuses.
« Reply #7 on: August 19, 2017, 01:39:28 PM »
You're welcome.  For the community's info, please let us know what you do and how it works out.

   j.
It don't mean a thing...
 
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